從Parse中檢索圖像

我正在嘗試從Parse中獲取圖像。我一直對這個代碼：從Parse中檢索圖像

import UIKit 
import Parse 
import ParseUI 

class ViewControllerHome: UIViewController, UITableViewDelegate, UITableViewDataSource { 

var imagesFiles = [PFFile]() 
var imageUser = [String]() 
var imageTitle = [String]() 

@IBOutlet weak var MessageTable: UITableView! 

let color = UIColor(red: 0.0/255.0, green: 105.0/255.0, blue: 92.0/255.0, alpha: 1) 
let colore = UIColor.whiteColor() 
let coloree = UIColor(red: 33.0/255.0, green: 33.0/255.0, blue: 33.0/255.0, alpha: 1) 

override func viewDidLoad() { 

    let query = PFQuery(className: "Messages") 
    query.orderByDescending("createdAt") 
    query.findObjectsInBackgroundWithBlock { (posts: [PFObject]?, error: NSError?) -> Void in 

     if error == nil { 

      for post in posts! { 

       self.imagesFiles.append(post["Post"] as! PFFile) 
       self.imageUser.append(post["Name"] as! String) 
       self.imageTitle.append(post["Title"] as! String) 

      } 

      self.MessageTable.reloadData() 


     }else{ 

      print(error) 

     } 

    } 

    super.viewDidLoad() 

    self.navigationController?.navigationBar.barTintColor = color 
    self.navigationController?.navigationBar.tintColor = colore 
    self.navigationController?.navigationBar.titleTextAttributes = [NSForegroundColorAttributeName: colore] 
    UITabBar.appearance().barTintColor = coloree 
    UITabBar.appearance().tintColor = colore 
    UITabBar.appearance().translucent = false 

    self.MessageTable.delegate = self 
    self.MessageTable.dataSource = self 

} 

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell { 
    let cell = MessageTable.dequeueReusableCellWithIdentifier("cell")! as! TableViewCellHome 

    //text 
    cell.UsernameLabel.text = imageUser[indexPath.row] 
    cell.Title.text = imageTitle [indexPath.row] 

    //image 
    imagesFiles[indexPath.row].getDataInBackgroundWithBlock { (imageData: NSData?, error: NSError?) -> Void in 

     if imageData != nil { 

      let image = UIImage(data: imageData!) 
      cell.PostImage.image = image 

     }else{ 

      print(error) 

     } 

    } 

    return cell 
} 

func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int { 

    return imagesFiles.count 
} 

@IBAction func refresh(sender: AnyObject) { 

    MessageTable.reloadData() 
} 
}

當我運行它，它返回只有用戶名和文章的標題，但在圖像應該待的地方是空白。下面是日誌：

在此先感謝

來源

2016-01-23 Edoardo Riggio

你調試了什麼postimage連接到？ – Wain

@很抱歉，但我該怎麼辦？ –

在設置圖像的位置放置一個斷點，例外說明，當你這樣做的時候，它實際上並不是一個圖像視圖... – Wain

從這些細節：

(lldb) po cell.PostImage 
<UITableViewCellContentView: 0x7fb700ebdc00; frame = (0 0; 320 389); opaque = NO; gestureRecognizers = <NSArray: 0x7fb700ea4c10>; layer = <CALayer: 0x7fb700e71d20>> 

(lldb) po cell 
<Talent.TableViewCellHome: 0x7fb700ebd3f0; baseClass = UITableViewCell; frame = (0 0; 320 389); clipsToBounds = YES; autoresize = W; layer = <CALayer: 0x7fb700e7c7b0>>

我們可以看到你出列的電池是好的，但是，提及您的圖像觀點實際上是引用單元格內容視圖。

這可能是插座連接的錯誤，您只需刪除現有連接並重新連接到圖像視圖即可。

來源

2016-01-24 11:26:36 Wain

從Parse中檢索圖像

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